Abstract: Rutting profile characteristic obtained from ordinary rutting test can be quite different from the actual situation,which makes the rut depth indices insufficiently representative. Based on the CC5 test carried out by NAPTF, a 3D rutting analysis model of flexible pavement structure is established by using ABAQUS. A load curve of halfsine wave is adopted to simulate the cyclic load process of the moving aircraft gears. The feasibility and accuracy of the model are then verified and evaluation indices are proposed considering the complexity of rutting profile characteristics. The load position lateral shift of aircraft gears is well reproduced in the simulation, therefore a series of turning points appeared in the rutting curves. The rutting depth of such points were then extracted, and the average rut depth and standard deviation were obtained after processing. Analyzingresults indicate that the average rutting depth and standard deviation can be used to describe the full-section feature of rutting profile.The environment temperature has notable impact on the distribution and development of rutting deformation. The simulated average rutting depth under the condition of 50益can be higher than that of the CC5 the results by 40%, and the standard deviation was increases by 70%.

Key words: aircraft load, rutting profile, flexible pavement, evaluation index